If you're considering this for hormonal balance or skin health, the clinical evidence behind **Evening Primrose Oil** is surprisingly thin. Each softgel gives you 1,000mg of the oil with 750mg of omega-6 fatty acids — the key component being gamma-linolenic acid (GLA), though the exact GLA amount per serving isn't specified on the label.
At the suggested 2–3 softgels daily, you're getting 2,000–3,000mg of evening primrose oil total. Most studies that found any benefit used doses in this range, so your intake would at least match the research protocols. The omega-6 fatty acids in EPO are a different category from the omega-3s (EPA/DHA) found in fish oil — they don't serve the same function.
The biggest gap here is evidence quality. Systematic reviews for evening primrose oil in eczema, PMS, and menopause have generally found weak or inconsistent results. If you're considering this for a specific health goal, the research may not support what you're hoping for.
BioStacks
Natural Factors Omega Factors
Ultra Prim Evening Primrose Oil 1000 mg
Capsule · 1 Softgel × 2/day · 90 servings · $0.19/serving
Ingredients (1)
Omega-6 Fatty Acids
100%Dose/day
1500 mg
Target
0–0 mg
Form
—
Nutrition
Calories, macros & sodium.
- Calories10 Calorie(s)
- Total Fat1 Gram(s)
- Polyunsaturated Fat1 Gram(s)
Other Ingredients (4)
GelatinCapsule
Protein derived from collagen, used in traditional capsule shells
GlycerinHumectant
Sweet-tasting liquid used in soft capsules and liquids
Mixed TocopherolsAntioxidant
Natural vitamin E used as preservative
Purified WaterSolvent
Water meeting USP specifications used as solvent/vehicle in gummies and liquids
How to Take It
Take it anytime
Timing doesn't matter for this one — taking it consistently does.
With or without food
Split into 2 doses across the day
On the label
Suggested Usage: 1 softgel 2-3 times per day or as directed by a health professional.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$17.47
Near the median of 34 evening primrose oil (GLA) supplements
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Sources & Scoring
Nutrient data (RDA, UL, and safety thresholds) sourced from the NIH Office of Dietary Supplements and the National Academies Dietary Reference Intakes (DRI).
This is not medical advice. Consult a healthcare provider before making changes to your supplement routine.
The score analyzes what's on the label: ingredient doses vs. studied ranges, chemical forms, evidence levels, and known interactions. It does not verify label accuracy or test for contaminants — for that, look for third-party certifications like USP or NSF.